Modeling of the processes of laser-nanoparticle interaction taking into account temperature dependences of parameters

Pustovalov, V. K.

doi:10.1134/s1054660x11090234

Cited by 31 publications

(35 citation statements)

References 30 publications

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“…The parameter P 1 ¼ K abs =K sca is greater than 1, P 1 [ 1 or P 1 ) 1 ð Þ , and the factor of absorption K abs is greater (or much greater in favorable cases) than the scattering factor K sca in the cases of predominant role of absorption. This situation allows to achieve maximal efficiency of solar radiation interaction with NP, resulting in maximal NP heating [18][19][20][21][22].…”

Section: Light-absorption Conditions For a Single Nanoparticlementioning

confidence: 99%

“…The achievement of maximal value T 0max of NP temperature under CW solar irradiation is described by [18][19][20][21][22] …”

Section: Light-absorption Conditions For a Single Nanoparticlementioning

confidence: 99%

“…is the initial NP and ambient medium temperature, k m is the coefficient of medium heat conduction, and the wavelengths k 1 , k 2 are the boundaries of the optical spectrum under consideration. This equation has been obtained from NP energy conservation equation taken into account radiation absorption, NP heating and heat loss inside the surrounding medium because of heat conduction [18][19][20][21][22]. The coefficient of heat conduction has constant value for water k m = 6.10 -3 W/cmK [23], and this assumption is based on the rather small temperature interval of NP heating of smaller than 100°C.…”

Section: Light-absorption Conditions For a Single Nanoparticlementioning

confidence: 99%

“…A maximal value of NP heating (depending on integral) is achieved under maximal close (approach) between the dependencies of selected K abs (k) and the well-known dependence of solar irradiance I S (k). It is also necessary to use the selected NP with maximal possible values r max 0 and K max abs [18][19][20][21][22]. The values of indexes n 0k , , 0k and n k [24,25] were used for calculation of the factors of absorption K abs and scattering K sca .…”

Section: Light-absorption Conditions For a Single Nanoparticlementioning

confidence: 99%

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Light-absorption selection of nanoparticles and nanofluids containing nanoparticles for their effective heating by solar radiation

Pustovalov

Astafyeva

Fritzsche

2017

Nanotechnol. Environ. Eng.

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Light-absorption selection of single nanoparticle for solar radiation requires the simultaneous fulfillment of all of the following novel conditions-maximal close (overlap) of the dependence of nanoparticle efficiency absorption factor on wavelength with the dependence solar irradiance, predominant role of nanoparticle absorption over its scattering, the use of maximal values of nanoparticle efficiency absorption factor and its size. These results highlight the possibility for effective application of single homogeneous Ti and core-shell Ti-TiO 2 , Ni-NiO nanoparticles with radii of about 75 nm as perfect absorbers for solar radiation in the complete optical spectrum 250-2500 nm. Light-absorption conditions for nanofluids include dominant radiation absorption by presented nanoparticles with selected properties and concentrations of about 1 9 10 9 , 1 9 10 10 cm -3 under the solar absorption by water in the spectral interval of 250-1000 nm, which includes * 70% of whole solar energy. Presented results can be applied for applications in the development of novel working nanofluids for direct absorption solar collectors. These conditions can be used for the selection of various nanoparticles from different materials and structures for other optical radiation sources.

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Section: Light-absorption Conditions For a Single Nanoparticlementioning

confidence: 99%

“…The achievement of maximal value T 0max of NP temperature under CW solar irradiation is described by [18][19][20][21][22] …”

Section: Light-absorption Conditions For a Single Nanoparticlementioning

confidence: 99%

Section: Light-absorption Conditions For a Single Nanoparticlementioning

confidence: 99%

Section: Light-absorption Conditions For a Single Nanoparticlementioning

confidence: 99%

See 2 more Smart Citations

Light-absorption selection of nanoparticles and nanofluids containing nanoparticles for their effective heating by solar radiation

Pustovalov

Astafyeva

Fritzsche

2017

Nanotechnol. Environ. Eng.

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“…(1)(2)(3)(4)(5)(6)(7)(8) The ultrahigh instantaneous power and ultrashort pulse duration of femtosecond laser pulses produces nonlinear (9,10) and nonequilibrium processes. (11,12) Several models based on different theories have been developed to study the interaction processes and subsequent dynamic evolution of the target.…”

Section: Introductionmentioning

confidence: 99%

Hydrodynamic Simulation of the Femtosecond Laser Processing of Metals

Su¹,

Wang²,

Jiang³

2018

dtetr

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The electron-ion collision frequency is a key factor for simulations of the interaction process of ultrashort lasers with metals. In this paper, we propose a semiempirical method based on the Drude-Sommerfeld model for obtaining the electron-ion collision frequency over a wide temperature range, from solid-state to high-temperature plasma. Moreover, we performed a series of hydrodynamic simulations including the modified electron-ion collision frequency. The results indicated that the modified electron-ion collision frequency can exactly describe not only the energy deposits of various femtosecond laser pulses but also the transient properties of electrons on the metal surface. Moreover, a simple function was identified to describe the relationship between laser intensity and peak electron temperature on the surface. This mothed is expected to be beneficial for simulations of the interaction process of femtosecond laser pulses with metals.

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Laser Irradiation of Gd−Si and Gd−Si−Ge Colloid Mixtures for the Fabrication of Compound Nanoparticles

et al. 2018

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compound nanoparticles (NPs) were prepared by laser irradiation of a mixture of colloidal solutions containing NPs of the relevant elements. It is assumed that the compound NPs are formed by heating, comelting, and chemical interactions in the alloyed droplets. The blackbody-like radiation of the heated NPs was used for temperature control of the NP-preparation process. The obtained results demonstrate that laser irradiation of colloidal NPs provides unique possibilities not only for the synthesis of compound NPs but also for control of their phase composition and size. The synthesized Gd-based compound NPs exhibited magnetic transition at an ordering temperature, T C , in the range of 310-320 K. Thus, the magnetic properties of the synthesized particles confirm their potential for biomedical applications, in particular, for magnetic hyperthermia treatment.[a] N.

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Modeling of the processes of laser-nanoparticle interaction taking into account temperature dependences of parameters

Cited by 31 publications

References 30 publications

Light-absorption selection of nanoparticles and nanofluids containing nanoparticles for their effective heating by solar radiation

Light-absorption selection of nanoparticles and nanofluids containing nanoparticles for their effective heating by solar radiation

Hydrodynamic Simulation of the Femtosecond Laser Processing of Metals

Laser Irradiation of Gd−Si and Gd−Si−Ge Colloid Mixtures for the Fabrication of Compound Nanoparticles

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